SECT. II. DISEASES. 



always distinguished by the name of honey-dew ; 

 which should not perhaps be applied except when 

 the exudation occasions disease. But if it is to be 

 applied to all saccharine exudations whatever, then 

 we must include under the appellation of honey- 

 dew the saccharine exudation observed on the 

 Orange-tree by M. De la Hire,^ together with that 

 of the Lime-tree which is more glutinous, and of 

 the Poplar which is more resinous ; as also that of 

 the Cistus creticus, from which the resin called 

 Labdanum is collected, by means of beating the 

 shrub with leathern thongs, and of the manna 

 which exudes from the Ash-tree of Italy and Larch 

 of France. It is also possible that the exudation 

 of excrement constituting honey-dew may occa- 

 sionally occur without producing disease ; for if it 

 should happen to be washed off soon after by rains 

 or heavy dews, then the leaves will not suffer. 



SUBSECTION V. 



Dropsy. Plants are also liable to a disease Occasion- 

 which affects them in a manner similar to that of much"* 

 the dropsy in animals, arising from long continued moisture - 

 rain or too abundant watering. Willdenow de- 

 scribes it as occasioning a preternatural swelling of 

 particular parts, and inducing putrefaction. It is 

 said to take place chiefly in bulbous and tuberous 



* Phys. des Arb. torn. i. p. 150. 



